- Update the main python version to 2.5.
- Now, lang/python is just a meta-port which depends on lang/python25.
- And all versions of Python ports have short version identifier in its
package name; python25-2.5, python24-2.4.3 and etc.
- Also you must upgrade all python modules after lang/python updated,
cd /usr/ports/lang/python && make upgrade-site-packages
- Give maintainership of Python ports to the new python@ group which
includes me, alexbl@ and others.

Don't use PYTHON_DISTFILE as well as PYTHON_WRKSRC on lang/python* ports
because it does not point the most recent version of each from
ports/Mk/bsd.python.mk 1.38.
Reported by: Andy Fawcett <andy@athame.co.uk>